package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

public class RefreshTokenInterceptor implements HandlerInterceptor {


    private StringRedisTemplate stringRedisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }


    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //获取请求头中的token
        String token = request.getHeader("authorization");

        if (StrUtil.isBlank(token)) {
            //不存在 拦截
            return true;
        }

        //基于token获取redis的用户
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().
                entries(RedisConstants.LOGIN_USER_KEY + token);

        if (userMap.isEmpty()) {
            return true;
        }

        //将hash数据转换为userDto
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);

        //这里是自己做了修改
//        UserDTO userDTO = new UserDTO();
//        BeanUtils.copyProperties(user, userDTO);
        UserHolder.saveUser(userDTO);

        //刷新token有效期
        stringRedisTemplate.expire(RedisConstants.LOGIN_USER_KEY + token, RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);


        //存在 保存信息到ThreadLocal
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

        //移除用户
        UserHolder.removeUser();

    }


}

